Door-spring.



M. DAENITZ.

DOOR SPRING.

APPLICATION r1150 11011.10. 1915.

1,172,013. Patented Feb. 15,1916.

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UNITED STATES, PATENT oFFioE; 5

MAX DAENITZ, OF HAMMOND, INDIANA.

DOOR-SPRING.

To all whom it may concern:

Be it known that I, MAX H. DAENITZ, 'a citizen of the United States, and a resident of Hammond, county of Lake, and State of Indiana, have invented certain new and useful Improvements in Door-Springs, of which the following is declared to be a full, clear,

and exact description.

This invention relates to door springs of that type employing a coiled torsion spring Figure 1, is a side elevation of a door spring embodying the present lnventlon,v

showing the same applied to a door and jamb; Fig. 2, is a horizontal section taken on line 22 of Fig. 1; Fig. 3, is a detail vertical section taken on line 33 of Fig. 2, and Fig. 4, is a detail horizontal section taken-on line 44 of Fig. 3. Referring to said drawing, A, designates a fragment of a door jamb, and B, a door hinged thereto in the usual manner.

C, designates the door spring as a whole,- the coiled torsion spring of which is seen at 10. The lower end of said coiled spring extends out laterally from the lowermost coil or turn of the spring, and inapproximately horizontal direction and is rotative'ly seated in a socket formed in a bracket 11, secured to the door jamb by screws 12. The upper end of the spring 10, is tightly wrapped around the lower, squared body portion of a head piece 13, which extends down into the hollow of the spring for a short distance and base. transversely extendingv groove 14:, formednear its upper end, into which is forced the extreme upper end portion 15, of the spring 10; thus securely fastening the spring rigidly to the head piece. upper end of the head piece 13, is formed an upwardly extending, many sided neck or lug 16, here shown as comprising a six sided neck, which is preferably tapered slightly toward its upper end. The spring with its attached head piece may be swung back and On the Specification of Letters Patent. I Patented Feb 15, 1916 Application filed November 10, 1915. Serial No; 60,651. Y i

r forth and sidewise from the-bracket 11, and

its upper end may be turned, to increase'or decrease tension as may be found desirable.

Detachably secured to said headpiece 13, is

a door engaging lever 17, which also serves as a lever for winding up the springand increasing lts tension or torsion. Said lever 17 has a straight handle portion 18, ar-

ranged to bear'against the side of the door,

and at the end of said handle is a finger piece or grip 19, which extends outward from the handle and door, whereby it may be taken hold of in adjusting the tension of the spring. 'On the other end of said handle is formed a socket member 20, having a cylindrical socket 21, in its lower side for the reception of the upper end of the spring and body portion of the head piece 13, and above said socket 21, is an aperture 22, formed 00- axial with the socket 21, and having the same contour as the tapered many sided neckof the headpiece; it is here shown as hexagonal in form. This furnishes a detachable con nection between the head pieceand lever for non-rotatively connecting theone with the other, whereby the lever may be drawn backward to tighten the tension on thespring,

and whereby the spring may act to force the handle end of the lever against the door in closing the same and holding it in closed position.

Projecting out from the socket member 20, of the lever 17,'is a lug '23, which eX-I tends approximately in line with the handle of the lever, but on the opposite side of the socket member and near the rear edge there of. Preferably said lugis round and curved forward. slightly as shown in ig. 2. '1ever17, is detachably secured to the door by said lug and a screw eye 24, into which the lug is inserted, said screw eye being screwed into the door near its hinged edge.

Said screw eye also acts as a fulcrum for the lever 17, to turn upon in attaching the lever to the door after the spring has been wound up. Ifdesired the lever may be formed with a transverse narrow slot 25,

near the finger piece, through which may extend a screw eye 26, which is screwed into the door, and the eye portion of said'screw eye may be turned at right angles to said slot to furnish additional attaching means for the lever. 1

In use, the parts are attached to the jamb and door as above set forth. To. increase the tension, the screw eye 26, is first turned walls of the aperture 22, in engagement with the many sided neck, 16, of the head,

piece, the handle projecting toward the door. The handle is then rotated upon the axis of the coiled spring as a center, there by increasing the tension or torsional. c-fiect of thespring; the lug 23, is then inserted in the screw eye 24, whereupon the spring acts to swing the handle portion of the lever against the door. The screw eye, 26, may now be turned at right angles to the slot 25, thereby preventing accidental detachment of the lever from the door. The spring effectively closes the door when opened and the degree of tension may be varied by applying the hexagonal aperture 22-, at various places on the hexagonal neck 16, of the head piece.

It is to be noted that thedoor spring may be made for right and for lefthand swinging doors by making right and left levers and making right and left hand coiled springs.

I claim as new and desire to secure by Letters Patent:

1. A door spring comprising a coiled. torsion spring, the lower end of which has an approximately horizontal arm, a bracket, in which said arm is rotatively seated, adapted to be secured to a door jamb, a head piece extending into the hollow of the upper end of said coiled spring and non-rotatively se-- a socket portion fitting over the head piece and having a many sided aperture for the reception of the neck portion thereof, said lever having also a lug projecting out from said socket member and arranged to engage a fastening device secured to-the door;

substantially as described.

2. A. door spring comprising a coiled torsion spring, the lower end of which has an approximately horizontal arm, a bracket, in: which. said arm is rotativelyseated, adapted to be secured to a door jamb, a head piece extending into the hollow of theupper end a of said coiled spring and non-rotatively securedfthereto, said :head P1608; having;

an upwardly extending many sided neck 3. A door spring comprising a coiled torsion spring, the lower end of which has a transversely extending arm, a bracket,'gin

which said arm is rotatively Seated, adapted to besecured to a door ja1nb,.a head piece extending into the hollow ofthespringat its upper end, andnon-rotatively secured. thereto, saidhead piece having an upwardly extending hexagonal neck portion, a door closing lever having a handle adapted to i engagethe sideof a door, and a socket portion fitting over the upper end of the spring, said. socket portion having a hexagonal aperture for the reception of said hexagonal neck, and a detachableconnection betweensaid lever and .door.:

October 25, 1915.'

MAX H: DAENITZ.

Copies of this patent maybe obtained for five cents each, by addressing the Commissioner of Patents,;

Washington, D. G. 

